Default Gemini adapter to yolo mode and add API access prompt note

Gemini CLI only registers run_shell_command in --approval-mode yolo.
Non-yolo modes don't expose it at all, making Paperclip API calls
impossible. Always pass --approval-mode yolo and remove the now-unused
policy engine code, approval mode config, and UI toggles.

Add a "Paperclip API access note" to the prompt with curl examples
via run_shell_command, since the universal SKILL.md is tool-agnostic.

Also extract structured question events from Gemini assistant messages
to support interactive approval flows.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/adapters/gemini-local/src/index.ts

@@ -30,7 +30,6 @@ Core fields:
 - instructionsFilePath (string, optional): absolute path to a markdown instructions file prepended to the run prompt
 - promptTemplate (string, optional): run prompt template
 - model (string, optional): Gemini model id. Defaults to auto.
-- approvalMode (string, optional): "default", "auto_edit", or "yolo" (default: "default")
 - sandbox (boolean, optional): run in sandbox mode (default: false, passes --sandbox=none)
 - command (string, optional): defaults to "gemini"
 - extraArgs (string[], optional): additional CLI args